I keep this pasted in to my diary. Thanks to Rudyard Kipling:
I keep six honest serving-men
(They taught me all I knew);
Their names are
What
And Why
And When
And How
And Where
And Who.
I send them over land and sea,
I send them east and west;
But after they have worked for me,
I give them all a rest.
Thanks to Rudyard Kipling for the above